Question: If input x [ n ] = cos ( 2 n ) + cos ( n ) , and x [ n ] y [

If input x[n]= cos( 2 n)+ cos(n), and x[n] y[n]= x[n]+ x[n 1]+ x[n 2]+ x[n 3] y[n],(a) Compute the frequency response H(ej).(b) Compute the output y[n].

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